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package org.hisp.dhis.category;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

import com.google.common.collect.Sets;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.hisp.dhis.common.DataDimensionType;
import org.hisp.dhis.common.DeleteNotAllowedException;
import org.hisp.dhis.test.integration.PostgresIntegrationTestBase;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author Lars Helge Overland
 */
@Transactional
class CategoryComboServiceTest extends PostgresIntegrationTestBase {

  @Autowired private CategoryService categoryService;

  @Autowired private CategoryManager categoryManager;

  private CategoryOption categoryOptionA;

  private CategoryOption categoryOptionB;

  private CategoryOption categoryOptionC;

  private CategoryOption categoryOptionD;

  private CategoryOption categoryOptionE;

  private CategoryOption categoryOptionF;

  private CategoryOption categoryOptionG;

  private Category categoryA;

  private Category categoryB;

  private Category categoryC;

  private CategoryCombo categoryComboA;

  private CategoryCombo categoryComboB;

  private CategoryCombo categoryComboC;

  private List<Category> categories;

  @BeforeEach
  void setUp() {
    categories = new ArrayList<>();
    categoryOptionA = new CategoryOption("OptionA");
    categoryOptionB = new CategoryOption("OptionB");
    categoryOptionC = new CategoryOption("OptionC");
    categoryOptionD = new CategoryOption("OptionD");
    categoryOptionE = new CategoryOption("OptionE");
    categoryOptionF = new CategoryOption("OptionF");
    categoryOptionG = new CategoryOption("OptionG");
    categoryService.addCategoryOption(categoryOptionA);
    categoryService.addCategoryOption(categoryOptionB);
    categoryService.addCategoryOption(categoryOptionC);
    categoryService.addCategoryOption(categoryOptionD);
    categoryService.addCategoryOption(categoryOptionE);
    categoryService.addCategoryOption(categoryOptionF);
    categoryService.addCategoryOption(categoryOptionG);
    categoryA = createCategory('A', categoryOptionA, categoryOptionB);
    categoryB = createCategory('B', categoryOptionC, categoryOptionD);
    categoryC = createCategory('C', categoryOptionE, categoryOptionF);
    categoryService.addCategory(categoryA);
    categoryService.addCategory(categoryB);
    categoryService.addCategory(categoryC);
    categories.add(categoryA);
    categories.add(categoryB);
    categories.add(categoryC);
  }

  // -------------------------------------------------------------------------
  // Tests
  // -------------------------------------------------------------------------
  @Test
  void testAddGet() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryComboB =
        new CategoryCombo("CategoryComboB", DataDimensionType.DISAGGREGATION, categories);
    categoryComboC =
        new CategoryCombo("CategoryComboC", DataDimensionType.DISAGGREGATION, categories);
    long idA = categoryService.addCategoryCombo(categoryComboA);
    long idB = categoryService.addCategoryCombo(categoryComboB);
    long idC = categoryService.addCategoryCombo(categoryComboC);
    assertEquals(categoryComboA, categoryService.getCategoryCombo(idA));
    assertEquals(categoryComboB, categoryService.getCategoryCombo(idB));
    assertEquals(categoryComboC, categoryService.getCategoryCombo(idC));
    assertEquals(categories, categoryService.getCategoryCombo(idA).getCategories());
    assertEquals(categories, categoryService.getCategoryCombo(idB).getCategories());
    assertEquals(categories, categoryService.getCategoryCombo(idC).getCategories());
  }

  @Test
  void testDelete() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryComboB =
        new CategoryCombo("CategoryComboB", DataDimensionType.DISAGGREGATION, categories);
    categoryComboC =
        new CategoryCombo("CategoryComboC", DataDimensionType.DISAGGREGATION, categories);
    long idA = categoryService.addCategoryCombo(categoryComboA);
    long idB = categoryService.addCategoryCombo(categoryComboB);
    long idC = categoryService.addCategoryCombo(categoryComboC);
    assertNotNull(categoryService.getCategoryCombo(idA));
    assertNotNull(categoryService.getCategoryCombo(idB));
    assertNotNull(categoryService.getCategoryCombo(idC));
    categoryService.deleteCategoryCombo(categoryComboA);
    assertNull(categoryService.getCategoryCombo(idA));
    assertNotNull(categoryService.getCategoryCombo(idB));
    assertNotNull(categoryService.getCategoryCombo(idC));
    categoryService.deleteCategoryCombo(categoryComboB);
    assertNull(categoryService.getCategoryCombo(idA));
    assertNull(categoryService.getCategoryCombo(idB));
    assertNotNull(categoryService.getCategoryCombo(idC));
  }

  @Test
  void testDeleteCategoryComboLinkedToCategory() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryComboB =
        new CategoryCombo("CategoryComboB", DataDimensionType.DISAGGREGATION, categories);
    long idA = categoryService.addCategoryCombo(categoryComboA);
    long idB = categoryService.addCategoryCombo(categoryComboB);
    long catIdA = categoryA.getId();
    long catIdB = categoryB.getId();
    assertNotNull(categoryService.getCategoryCombo(idA));
    assertNotNull(categoryService.getCategoryCombo(idB));
    categoryA.setCategoryCombos(Sets.newHashSet(categoryComboA, categoryComboB));
    categoryB.setCategoryCombos(Sets.newHashSet(categoryComboA, categoryComboB));
    categoryService.updateCategory(categoryA);
    categoryService.updateCategory(categoryB);
    categoryService.deleteCategoryCombo(categoryComboA);
    assertNull(categoryService.getCategoryCombo(idA));
    assertNotNull(categoryService.getCategoryCombo(idB));
    assertNotNull(categoryService.getCategory(catIdA));
    assertNotNull(categoryService.getCategory(catIdB));
    assertTrue(categoryService.getCategoryCombo(idB).getCategories().contains(categoryA));
    assertTrue(categoryService.getCategoryCombo(idB).getCategories().contains(categoryB));
    assertFalse(categoryService.getCategory(catIdA).getCategoryCombos().contains(categoryComboA));
    assertTrue(categoryService.getCategory(catIdA).getCategoryCombos().contains(categoryComboB));
    assertFalse(categoryService.getCategory(catIdB).getCategoryCombos().contains(categoryComboA));
    assertTrue(categoryService.getCategory(catIdB).getCategoryCombos().contains(categoryComboB));
  }

  @Test
  void testDeleteCategory() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryComboB =
        new CategoryCombo("CategoryComboB", DataDimensionType.DISAGGREGATION, categories);
    categoryService.addCategoryCombo(categoryComboA);
    categoryService.addCategoryCombo(categoryComboB);
    categoryA.setCategoryCombos(Sets.newHashSet(categoryComboA, categoryComboB));
    categoryService.updateCategory(categoryA);
    assertThrows(DeleteNotAllowedException.class, () -> categoryService.deleteCategory(categoryA));
  }

  @Test
  void testGetAll() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryComboB =
        new CategoryCombo("CategoryComboB", DataDimensionType.DISAGGREGATION, categories);
    categoryComboC =
        new CategoryCombo("CategoryComboC", DataDimensionType.DISAGGREGATION, categories);
    categoryService.addCategoryCombo(categoryComboA);
    categoryService.addCategoryCombo(categoryComboB);
    categoryService.addCategoryCombo(categoryComboC);
    List<CategoryCombo> categoryCombos = categoryService.getAllCategoryCombos();
    // Including default
    assertEquals(4, categoryCombos.size());
    assertTrue(categoryCombos.contains(categoryComboA));
    assertTrue(categoryCombos.contains(categoryComboB));
    assertTrue(categoryCombos.contains(categoryComboC));
  }

  @Test
  void testGenerateCategoryOptionCombos() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryService.addCategoryCombo(categoryComboA);
    categoryService.generateOptionCombos(categoryComboA);
    Set<CategoryOptionCombo> optionCombos = categoryComboA.getOptionCombos();
    assertEquals(8, optionCombos.size());
    assertOptionCombos(optionCombos);
  }

  @Test
  void testUpdateCategoryOptionCombosA() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryService.addCategoryCombo(categoryComboA);
    categoryService.generateOptionCombos(categoryComboA);
    assertNotNull(categoryComboA.getOptionCombos());
    assertEquals(8, categoryComboA.getOptionCombos().size());
    assertOptionCombos(categoryComboA.getOptionCombos());
    categoryC.addCategoryOption(categoryOptionG);
    categoryService.updateCategory(categoryC);
    categoryService.updateOptionCombos(categoryComboA);
    assertNotNull(categoryComboA.getOptionCombos());
    assertEquals(12, categoryComboA.getOptionCombos().size());
    assertOptionCombos(categoryComboA.getOptionCombos());
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionA, categoryOptionC, categoryOptionG)));
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionA, categoryOptionD, categoryOptionG)));
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionB, categoryOptionC, categoryOptionG)));
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionB, categoryOptionD, categoryOptionG)));
  }

  @Test
  void testUpdateCategoryOptionCombosB() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryService.addCategoryCombo(categoryComboA);
    categoryService.generateOptionCombos(categoryComboA);
    assertNotNull(categoryComboA.getOptionCombos());
    assertEquals(8, categoryComboA.getOptionCombos().size());
    assertOptionCombos(categoryComboA.getOptionCombos());
    categoryService.updateOptionCombos(categoryComboA);
    assertNotNull(categoryComboA.getOptionCombos());
    assertEquals(8, categoryComboA.getOptionCombos().size());
    assertOptionCombos(categoryComboA.getOptionCombos());
  }

  @Test
  void testUpdateCategoryOptionCombosC() {
    categoryComboA =
        new CategoryCombo("CategoryComboA", DataDimensionType.DISAGGREGATION, categories);
    categoryService.addCategoryCombo(categoryComboA);
    categoryService.generateOptionCombos(categoryComboA);
    assertNotNull(categoryComboA.getOptionCombos());
    assertEquals(8, categoryComboA.getOptionCombos().size());
    assertOptionCombos(categoryComboA.getOptionCombos());
    categoryC.addCategoryOption(categoryOptionG);
    categoryService.updateCategory(categoryC);
    categoryService.updateOptionCombos(categoryC);
    assertNotNull(categoryComboA.getOptionCombos());
    assertEquals(12, categoryComboA.getOptionCombos().size());
    assertOptionCombos(categoryComboA.getOptionCombos());
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionA, categoryOptionC, categoryOptionG)));
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionA, categoryOptionD, categoryOptionG)));
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionB, categoryOptionC, categoryOptionG)));
    assertTrue(
        categoryComboA
            .getOptionCombos()
            .contains(
                createCategoryOptionCombo(
                    categoryComboA, categoryOptionB, categoryOptionD, categoryOptionG)));
  }

  @Test
  void testAddAndPruneCategoryOptionCombo() {
    categories.clear();
    categories.add(categoryA);
    categories.add(categoryB);
    CategoryCombo categoryComboT =
        new CategoryCombo("CategoryComboT", DataDimensionType.DISAGGREGATION, categories);
    long id = categoryService.addCategoryCombo(categoryComboT);
    categoryComboT = categoryService.getCategoryCombo(id);
    assertNotNull(categoryComboT);
    assertEquals(categories, categoryComboT.getCategories());
    categoryManager.addAndPruneAllOptionCombos();
    assertTrue(
        categoryComboT
            .getOptionCombos()
            .contains(createCategoryOptionCombo(categoryComboT, categoryOptionA, categoryOptionC)));
    assertFalse(
        categoryComboT
            .getOptionCombos()
            .contains(createCategoryOptionCombo(categoryComboT, categoryOptionA, categoryOptionE)));
    categoryB.removeCategoryOption(categoryOptionC);
    categoryB.addCategoryOption(categoryOptionE);
    categoryService.updateCategory(categoryB);
    categoryManager.addAndPruneAllOptionCombos();
    categoryComboT = categoryService.getCategoryCombo(id);
    assertFalse(
        categoryComboT
            .getOptionCombos()
            .contains(createCategoryOptionCombo(categoryComboT, categoryOptionA, categoryOptionC)));
    assertTrue(
        categoryComboT
            .getOptionCombos()
            .contains(createCategoryOptionCombo(categoryComboT, categoryOptionA, categoryOptionE)));
  }

  private void assertOptionCombos(Set<CategoryOptionCombo> optionCombos) {
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionA, categoryOptionC, categoryOptionE)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionA, categoryOptionC, categoryOptionF)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionA, categoryOptionD, categoryOptionE)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionA, categoryOptionD, categoryOptionF)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionB, categoryOptionC, categoryOptionE)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionB, categoryOptionC, categoryOptionF)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionB, categoryOptionD, categoryOptionE)));
    assertTrue(
        optionCombos.contains(
            createCategoryOptionCombo(
                categoryComboA, categoryOptionB, categoryOptionD, categoryOptionF)));
  }
}
